Getting the smoke smell out will be difficult but if the fabric has been subjected to extreme heat it will deteriorate more quickly over time even if it looks OK now. It doesn't take long in a fire for the heat to reach high levels even at the other end of a house where there might not be actual burning. I had a clock melt in the opposite end of a house during a fire. Even if you can get the smoke smell out I would be cautious about using the fabric on anything that you put a lot of time and work into. If the fabric was stored in a plastic bag at here house then obviously it didn't get that hot or the bag would have melted but if it was put into a plastic bag after the fire to remove it from the house then I'd be cautious about the heat damage.